Propagating Kink Waves in an Open Coronal Magnetic Flux Tube with Gravitational Stratification: Magnetohydrodynamic Simulation and Forward Modelling
arXiv:2406.19474 · doi:10.1051/0004-6361/202450769
Abstract
Context. In the coronal open-field regions, such as coronal holes, there are many transverse waves propagating along magnetic flux tubes, generally interpreted as kink waves. Previous studies have highlighted their potential in coronal heating, solar wind acceleration, and seismological diagnostics of various physical parameters. Aims. This study aims to investigate propagating kink waves, considering both vertical and horizontal density inhomogeneity, using three-dimensional magnetohydrodynamic (MHD) simulations. Methods. We establish a 3D MHD model of a gravitationally stratified open flux tube, incorporating a velocity driver at the lower boundary to excite propagating kink waves. Forward modelling is conducted to synthesise observational signatures of the Fe ix 17.1 nm line. Results. It is found that resonant absorption and density stratification both affect the wave amplitude. When diagnosing the relative density profile with velocity amplitude, resonant damping needs to be properly considered to avoid possible underestimation. In addition, unlike standing modes, propagating waves are believed to be Kelvin-Helmholtz stable. In the presence of vertical stratification, however, phase mixing of transverse motions around the tube boundary can still induce small scales, partially dissipating wave energy and leading to a temperature increase, especially at higher altitudes. Moreover, forward modeling is conducted to synthesise observational signatures, revealing the promising potential of future coronal imaging spectrometers such as MUSE in resolving these wave-induced signatures. Also, the synthesised intensity signals exhibit apparent periodic variations, offering a potential method to indirectly observe propagating kink waves with current EUV imagers.
accepted for publication in A&A
References in corpus (53)
- PLUTO: a Numerical Code for Computational Astrophysics
- The Solar Orbiter mission -- Science overview
- Alfven Waves in the Lower Solar Atmosphere
- Prevalence of Small-scale Jets from the Networks of the Solar Transition Region and Chromosphere
- High Resolution Observations and Modeling of Dynamic Fibrils
- Persistent Doppler shift oscillations observed with HINODE/EIS in the solar corona: spectroscopic signatures of Alfvenic waves and recurring upflows
- Global maps of the magnetic field in the solar corona
- Fine strand-like structure in the solar corona from MHD transverse oscillations
- First direct measurements of transverse waves in solar polar plumes using SDO/AIA
- The Spectroscopic Signature of Quasi-periodic Upflows in Active Region Timeseries
- Transient small-scale brightenings in the quiet solar corona: a model for campfires observed with Solar Orbiter
- A basal contribution from p-modes to the Alfvénic wave flux in the Sun's corona
- Resonant absorption in complicated plasma configurations: applications to multi-stranded coronal loop oscillations
- MHD Waves in open coronal structures
- Heating by transverse waves in simulated coronal loops
- Probing the physics of the solar atmosphere with the Multi-slit Solar Explorer (MUSE): I. Coronal Heating
- Spectroscopic signature of Alfvén waves damping in a polar coronal hole up to 0.4 solar radii
- Magnetohydrodynamic Fast Sausage Waves in the Solar Corona
- Magnetohydrodynamic kink waves in nonuniform solar flux tubes: phase mixing and energy cascade to small scales
- Mapping the magnetic field in the solar corona through magnetoseismology
- Modelling observed decay-less oscillations as resonantly enhanced Kelvin-Helmholtz vortices from transverse MHD waves and their seismological application
- Upflows in the upper solar atmosphere
- First direct observation of a torsional Alfvén oscillation at coronal heights
- The passband integrationproperties of Birefringent filter
- Decayless oscillations in solar coronal bright points
- The First 3D Coronal Loop Model Heated by MHD Waves against Radiative Losses
- Wave heating in gravitationally stratified coronal loops in the presence of resistivity and viscosity
- Phase mixing and wave heating in a complex coronal plasma
- High Frequency Waves in Chromospheric Spicules
- A Statistical Study of Short-period Decayless Oscillations of Coronal Loops in an Active Region
- Weak damping of propagating MHD kink waves in the quiescent corona
- High frequency decayless waves with significant energy in Solar Orbiter/EUI observations
- Contribution of observed multi frequency spectrum of Alfvén waves to coronal heating
- Wave pressure and energy cascade rate of kink waves computed with Elsasser variables
- Kink Oscillations in Solar Coronal Loops with Elliptical Cross-Sections. I. the linear regime
- Traveling kink oscillations of coronal loops launched by a solar flare
- The Role of High-frequency Transverse Oscillations in Coronal Heating
- Resonant absorption in expanding coronal magnetic flux tubes with uniform density
- On the Parallel and Perpendicular Propagating Motions Visible in Polar Plumes: An Incubator For (Fast) Solar Wind Acceleration?
- Cut-off of transverse waves through the solar transition region
- Effect of Coronal Loop Structure on Wave Heating by Phase Mixing
- Revisiting the relation between nonthermal line widths and transverse MHD wave amplitudes
- 30-min Decayless Kink Oscillations in a Very Long Bundle of Solar Coronal Plasma Loops
- Observations of Fan-Spine Topology by Solar Orbiter/EUI: Rotational Motions and Indications of Alfvén Waves
- Alfvénic motions arising from asymmetric acoustic wave drivers in solar magnetic structures
- A statistical study of propagating MHD kink waves in the quiescent corona
- Influence of the Lower Atmosphere on Wave Heating and Evaporation in Solar Coronal Loops
- Decayless oscillations in 3D coronal loops excited by a power-law driver
- How transverse MHD wave-driven turbulence influences the density filling factor in the solar corona?
- Fe XII and Fe XIII Line Widths in the Polar Off-limb Solar Corona up to 1.5 Rsun
- Estimating Ion Temperatures at the Polar Coronal Hole Boundary
- Global Coronal Magnetic Field Estimation Using Bayesian Inference
- Investigating coronal wave energy estimates using synthetic non-thermal line widths